At the end of the century, human society entered a golden age. Political stability, rapid economic development, conflicts in local areas gradually subsided, and science and technology are advancing with each passing day.
But no matter in which era, there is always a group of people who base their happiness on the pain of others. They are parasitic in the lives of others, relying on various insidious means to obtain their own interests and cannibalize the lives of others. This later became a serious social phenomenon, causing several major vicious incidents, and everyone's pursuit of profit reached an unprecedented level. The so-called "golden age" is thus cast a shadow...
"Character cancer", this kind of person is called so.
Justice needs to be reshaped and stains need to be cleansed. With this belief, a man named "The Devourer" appears. His/her gender is unknown, he/she appears and disappears, and his/her abilities are different from ordinary people. And he/she reshapes justice and cleanses the stain in a simple and crude way - murder.
"My name is Devourer, the darkness that swallows darkness." He/she calls himself/herself.
"The mantis stalks the cicada, and the oriole is behind. I am the oriole, and it doesn't matter whether you are a mantis or a cicada." He/she mocked those with cancerous personalities.
At the end of the century, the "Devourer Serial Murders" began. And this is just the beginning of another even greater plan...